Samsung SPH-I300 - Manual (Page 95)

Section 6
92 Making and Answering Calls
Selecting an IP Address Dynamically
Everyone who logs into the Wireless Web needs to have a
unique identifier (IP Address). Some networks assign a
temporary IP address when clients log in. Use the IP address
field to select automatic or temporary IP addressing. If your IP
address is permanently assigned, ask your system
administrator for the permanent address. If your provider
supports dynamic IP addressing, make sure IP Address is
checked in the Details dialog box.